Type-writing machine.



M. S. CUMNER.

TYPE WRITING MAGHINE. lAPPLICATION PI'LBD JAN. 11, 191-0.

sof

naaien MATTHEW S. CUMNER,

OF NEW YORK, N. Y.

TYPE-WRITING MACHINE.

To dit whom it may concern:

Be it known that I, MATTHEW S. CUM issn, citizen` of the United States of VAmerica.,and residing at N ew York, in the county 4of New York and State of Yorlgliave invented certain new and useful Improvements in Type-VVriting Machines, of which the following is a specification, such as will enable those skilled in the art to which it appertains to make and use the same. p

This invention relates to typewriting machines, and the object thereof is to provide readily detachable key levers therefor; a further object being to so construct the said key levers as to be individually detachable without interfering in any Way with the remaining'levers, or other parts of the said machine; a further object being to provide individual guides and locking means for the said levers; a further object being to `form the said guides collectively of one piece; a further object being to provide individual tension springs for the said levers and collectively formed of one piece; and a still further object being to accomplish the desired results in a simple, uniform, practical,

and economical manner.

My invention is fully described in the ollowing specification, of which the accompanying drawing forms a part, said drawing being a fragmentary perspective show- -ing of a preferred method of accomplishing the desired results.

In the said drawing l have shown a portion a of a typewriting machine base and rovided, at the rear thereof, with an upright member a2, while at the front thereof, and arranged in any desired manner, isa lever guide a3 having a plurality of vertical slots a* therein.

Secured upon the upright a2 is a horizontally arranged plate Z) provided, at the forward edge thereof, with a depending member Z22 provided with a plurality of slots 3 therein corresponding, in number and position, with the slots a" and forming teeth similar to a comb.

Arranged between the support a: and the plate Z) is a spring plate c having a plurality of slots c2 therein forming teeth o3 which are curved downwardly and forwardly to project beyond the depending member rsaid teeth c forming individual springs for the key levers and, as clearly shown, they extend from one tooth b4 to Specification oi Letters'Patent. Application filed January 17, 1910. Serial No. 538,340.

only to Patented Aug. lidad,

another and thus cover the corresponding slots b3, said spring plate, as well as the plate b, being held 1n position by means of screws c4 or equivalent.

I have shown a plurality 4of key levers al y arranged in banks'm the usual manner, al?, this difference in the form of the levers being conned to the forward ends thereof,- as all of the rear ends thereof are alike and com rise arecess d in the top edge of each of t e said levers forming heads Z4 which I preferably incline yor curve for ease in assembling or detaching.

At e I have shown a plurality of hangers or hooks which are connected with the corresponding type-bars, the latter not being shown as they may be of any desired construction, and, in assembling, all that is necessary is to move a lever d, from front to rear, through the corresponding slot a", thence through the l and through the corresponding slot t, the inc line or curve of the lever head ri* forcing the corresponding spring linger c3 downwardly to permit the entrance of the lever head after which the said spring finger exerts pressure against the lever and holds the recessed portioiral3 against the depending member Z22 and between the adjacent teeth o4 and the key lever is thus locked in position.

lt -Will be observed, from this construction,. that the usual pivot rod passing through all the levers is omitted, `thuis not interfering with any other lever when removing or replacing one, and, while the levers are readily movable'in the type-bar operation, they are held dislodgnient, thus permitting the substitution of any or all of them for re air or the like, and this is also important Wien an unskilled person desires to send one of the levers to the factory, perhaps at a great distance, as he does not need to employ a mechanic to remove the lever, nor does he need to pay more than light postage instead of heavy express charges if the entire machine were sent to the factory, although, because of the simplicity of thelever construction, thereV could be but slight chance for breakage, it probably being necessary replace the characters on the keys at times.

It will thus be seen that I provide key levers readily/,detachable from a machine and without interfering with others, I procorresponding hook e,v

against accidental ilar manner, thus preserving uni vide front guides formed of of metal or the like, and I provide to l uides and locking ineens o n these parts as Well as in the lei will be obvious that do not eo* t0 the exact details showrand many changes thereover *will y selves according to conditions e ,t in different makes of l ieli inaoliii il l l l I i l Havin 'fully des my invention, what I c aiin as new and sire to secure by I 'Letters Iatent, is

l. In a typewriting inachne, a plnraiity of key levers, a coiii'lil'ilre guide edjacen/ ends thereof, and a spring for hoi' o said levers against the guide having, each, a. 'tapered head force said spring awry rroin assembling, and a recess adgecenr said llene.

1for engagement with sa r 2. In a typewriting nia i iv plurality of key levers provi led, eal A with an v saine in position i said plates being ]o1ntly held to said Inachine.

clined head, and a recess adjacent thereto, a

comb-like guide for said levers, and a plate provided with an integral spring tooth for each of said levers, said springs serving to hold said levers in position in said guide.

3. In a typevvriting machine, a plurality of key levers provided, each, With a tapered head and a recess adjacent thereto, a plate having e plurality of downwardlydirected teeth serving as guides for said levers, and a plate having a plurality of spring teeth, one for cach lever, and serving to maintain the with respect to said guides,

In testimony that I claim the foregoing as iny invention I have signed iny name 1n presence of the subscribing Witnesses this 3rd day of January 1910. l l

MATTHEW S. CUMNER. "fslitncsses l?. W. GEissENHMNER, A. M. WHEELER. 

